King Grey once benefited from unrivaled strength, wealth, and prestige in a world governed by martial ability, but now finds himself reborn in a society dominated by magic. Given a second chance at life, the once-king strives to understand his role in this new world and the purpose of his reincarnation while correcting the mistakes of his past.

A story of a villain, Fang Yuan who was reborn 500 years into the past with the Spring Autumn Cicada he painstakingly refined. With his profound wisdom, battle and life experiences, he seeks to overcome his foes with skill and wit! Ruthless and amoral, he has no need to hold back as he pursues his ultimate goals. In a world of cruelty where one cultivates using Gu - magical creatures of the world - Fang Yuan must rise up above all with his own power.